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ACOSH

Undoes COSH: for a number of 1 or more, the value of 0 or more that has it as its hyperbolic cosine.

Group: Math. Compatible with DAX.

Syntax

ACOSH ( <number> )

Parameter	Type	Description
`number`	Number	A number of 1 or more.

Returns

Number. The number of 0 or more whose hyperbolic cosine is the number given.

Remarks

Below 1 the call is an error, and so it is for a blank, which counts as 0.
It undoes COSH for numbers of 0 and up: ACOSH ( COSH ( 1.5 ) ) is 1.5.

Examples

Inverse hyperbolic cosines

EVALUATE
ROW (
    "Of 1", ACOSH ( 1 ),
    "Of 10", ACOSH ( 10 ),
    "Undoing COSH", ACOSH ( COSH ( 1.5 ) )
)

Of 1	Of 10	Undoing COSH
0	2.99322284612638	1.5

COSH, ASINH, ATANH.

Last updated 3 November 2026 · OpenBI Studio 0.3.74